What Our Customers Think of Optimum Nutrition Protein

Our community of reviewers weigh in on the effectiveness, taste, and mixability of Optimum Nutrition’s top-selling products, as well as how they help them achieve their fitness and physique goals.

Optimum Nutrition has a long history of producing high-quality supplements that are both effective and affordable for serious athletes and fitness enthusiasts. To be honest, everyone who has ever disclosed their affiliation with Bodybuilding.com has heard at least once, “Yes, I am aware of you. That is the location where I purchase my Gold Standard whey.”

So how do these tried-and-true products fare today? What our customers have to say about Optimum’s three most popular protein products. They even divulged some of their not-so-secret family recipes.

Optimum Gold Standard 100% Whey

Would we all be drinking post-workout protein shakes if it weren’t for Optimum Gold Standard 100% Whey? It is improbable. It has been a top-selling protein for nearly as long as bodytechsupplements.com.au has existed, with over 10,000 reviews to date. The feedback we consistently receive is straightforward: it’s a well-made product at a reasonable price that is easily digestible.

With 14 unique flavours to choose from, you’ll never be bored. If you’re looking for the top-rated flavours based on user feedback, Extreme Milk Chocolate and Mocha Cappuccino are tied for first place, each with an average rating of 9.1 out of 10.

The Community’s Take: “I’v utilised a variety of different brands. When it comes to price vs. quality, Optimum whey is unquestionably the best!” – wmdogan

“The mocha cappuccino flavour is absolutely delectable. It’s simple to combine using a shaker cup. I’ve tried nearly every brand on the market, and Optimum’s whey is consistently delicious and easy to mix.” – Nichols Bjnichols

“You’re going to adore it, as I am. Blend either Double Rich Choc, Extreme Milk Choc, or Mocha in a blender. 2 whey protein scoops, 5 g unsweetened cocoa powder, 12 g chocolate PB, 3/4 cup unsweetened almond milk, ice” – jesseyboyfit

Optimum Gold Standard 100% Casein

Casein protein, whey protein’s slower-digesting cousin, is a favourite of physique athletes and bodybuilders looking to meet a challenging protein target or quell nighttime cravings. Casein’s thicker texture makes it an excellent substitute for puddings and ice creams, and customers consistently report that this is their go-to snack option for satisfying their sweet tooth while also preventing muscle loss.

What The Community Says: “Among all the supplements on the market, this is by far the best and most effective! And if you miss a workout or need to take a break, continue taking this to help maintain your gains. I never add anything to this except a dash of pumpkin pie spice to make it taste identical to eggnog. I drink this before bed while watching a little television, and when I’m done, I always feel a little pumped. I GROW as soon as I jump into bed!” – rorinsmith 

“Perfect for an evening snack or to make a protein fluff.” Fabiano10 

“Very high-quality protein that mixes well. This serves as an evening snack for me.” Sorgedb –

Optimum Nutrition Serious Mass Gainer

This is not your grandmother’s meal substitute. Each serving of Serious Mass contains 1,250 calories, 50 grams of protein, 250 grams of carbohydrates, and vitamins and minerals to provide your body with everything it needs to build muscle. It was formulated with whey and casein to easily dissolve in milk or water without clumping.

How, however, does it taste? Thousands of reviews indicate that this is one of the best-tasting and most effective weight gainers available.

The Community’s Take: “Th “s is the most effective mass gainer I’ve tried. Excellent blendability. I’ve been using it roughly twice a day in between meals and have noticed a noticeable difference. I gained 10 pounds over the last four months and have surpassed my goal of benching 225lbs x 20 reps to complete 21-rep sets. I started with 13 reps. The average size of the human body has increased dramatically.” – adamwatts0311 

“I’ve been taking this product for about two months: one serving immediately following my morning workout with creatine at 8 a.m., and a second serving around lunchtime. And I must admit that I’ve easily gained between 12 and 15 pounds. However, you must put in the effort!” – blackgod43 

“I’m extremely sensitive to proteins and mass gainers, as their ingredients make me ill for days after I consume them. However, ON products do not have that effect on me. And, as a hardgainer, I require an additional few hundred to thousand calories in my diet. Taking this course of action while adhering to a sound diet and exercise routine has aided significantly in my weight gain.” – jacobdolores